There were really gold mines during the war. As the saying goes, "antiques in prosperous times are gold in troubled times". In troubled times, gold, as one of the currencies, will never depreciate in deposits. For example, during World War I and World War II, the world powers were paying close attention to their gold mines (that is, gold reserves). At that time, the dignitaries in the economic circles were also paying attention to their gold mines for emergencies. Until now, all countries still regard gold as the biggest hedging tool. Today, the United States has the largest gold reserve in the world.